Bare-cell inspection system, and point inspection method for bare-cell inspection system

Abstract

A bare-cell inspection system, and a point inspection method for a bare-cell inspection system. The bare-cell inspection system comprises: a conveying line (10); a body inspection assembly (21); a first inner tab inspection assembly (22); an outer tab inspection assembly (23) and a second inner tab inspection assembly (24); and an upper computer (30), which is used for inspecting a macro-surface image, a top-surface image, a bottom-surface image, a cathode tab inner-surface image, a cathode tab outer-surface image, an anode tab outer-surface image and an anode tab inner-surface image, so as to obtain a surface inspection result of a bare cell.

Description

Bare cell detection system and inspection method of bare cell detection system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410187401.6, filed on February 20, 2024, entitled “Bare Cell Detection System and Inspection Method for Bare Cell Detection System,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a bare cell detection system and a spot inspection method for the bare cell detection system. Background Art

[0004] With the development of new energy technologies, batteries are being used more and more widely. As an important component of batteries, the quality of bare cells is becoming increasingly important. Currently, visual inspection is generally used to check whether the surface of bare cells is qualified. However, since multiple surfaces of bare cells need to be inspected, different cameras need to be configured for each surface to meet the requirements of different surfaces. This results in a large number of cameras and a variety of different types. The cameras are also scattered in different locations, which easily leads to low efficiency and low accuracy in the inspection results of whether the bare cell surface is qualified.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a bare cell detection system and a spot inspection method for the bare cell detection system, which can effectively improve the efficiency and accuracy of the detection results of various surfaces of the bare cell.

[0007] In a first aspect, an embodiment of the present application provides a bare cell detection system, comprising:

[0008] A conveyor line is used to convey a bare cell through a bare cell main body detection assembly, a first inner tab detection assembly, an outer tab detection assembly, and a second inner tab detection assembly, wherein the bare cell includes a main body, and a cathode tab and an anode tab extending from a top surface of the main body;

[0009] The main body detection component is used to photograph the large surface, top surface and bottom surface of the main body when the bare cell arrives at the bare cell main body detection station to obtain a large surface image, a top surface image and a bottom surface image;

[0010] A first inner tab detection component is used to photograph the inner surface of the cathode tab of the bare battery cell when the bare battery cell arrives at the first inner tab detection station to obtain an image of the inner surface of the cathode tab;

[0011] The outer tab detection component is used to photograph the outer surface of the cathode tab and the outer surface of the anode tab of the bare cell when the bare cell arrives at the tab detection station to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface;

[0012] The second inner tab detection component is used to photograph the inner surface of the anode tab when the bare battery cell arrives at the second inner tab detection station to obtain an image of the inner surface of the anode tab;

[0013] The host computer is used to detect the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image to obtain the surface detection results of the bare battery cell.

[0014] Based on this, when it is necessary to inspect the surface of the bare battery cell, the conveyor line can transport the bare battery cell to the main detection component, the first inner tab detection component, the outer tab detection component, and the second inner tab detection component respectively. Each detection component can automatically align with its corresponding bare battery cell surface, thereby realizing automated acquisition of the surface image of the bare battery cell. Finally, the host computer can generate the battery surface inspection results by identifying the surface images of each surface of the bare battery cell. Based on this, manpower can be effectively saved, and the host computer can determine the inspection results, which can also improve the inspection efficiency and accuracy of the inspection results.

[0015] In some implementations of the first aspect, the conveyor line is further used to convey the profiling block through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly, and the second inner tab detection assembly, the profiling block including a profiling main body, and a cathode profiling tab and an anode profiling tab extending from a top surface of the profiling main body;

[0016] The shaped block matches the structure of the bare battery cell, and the shaped block includes a shaped large surface corresponding to the large surface of the bare battery cell, a shaped top surface corresponding to the top surface of the bare battery cell, a shaped bottom surface corresponding to the bottom surface of the bare battery cell, a shaped cathode tab inner surface corresponding to the inner surface of the cathode tab, a shaped cathode tab outer surface corresponding to the outer surface of the cathode tab, a shaped anode tab inner surface corresponding to the inner surface of the anode tab, and a shaped anode tab outer surface corresponding to the inner surface of the anode tab;

[0017] The profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab inner surface and the profiling anode tab outer surface are all provided with calibration pieces, wherein the calibration pieces located on different profiling surfaces of the profiling block have similar shapes but different areas;

[0018] Any one of the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly, and the second inner tab detection assembly is further configured to capture an image of the corresponding profiling surface of the detection assembly to obtain a spot inspection image when the profiling block reaches the corresponding detection station of the detection assembly;

[0019] The host computer is also used to generate the inspection results of each inspection component based on each inspection image.

[0020] Based on this, the calibration parts used for spot inspection at each inspection station are integrated on the surface of the profiling block that is consistent with the shape and size of the real bare battery cell. On the one hand, it is convenient to store the various calibration parts. On the other hand, it can automatically simulate the inspection process of the bare battery cell, save labor costs, and make the inspection results more referenceable.

[0021] In some implementations of the first aspect, the calibration piece of the contoured surface includes at least one grayscale region within any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. If there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different.

[0022] The host computer is specifically used to obtain the first area image corresponding to each grayscale area in the spot inspection image taken for each detection component, determine the grayscale information of each first area image, compare the grayscale information of each first area image with the reference grayscale information of each grayscale area, and generate the spot inspection result of the first shooting parameter of each detection component.

[0023] Based on this, by comparing the grayscale information of the grayscale area in the image with the reference grayscale information of the grayscale area, the image comparison result can be accurately obtained, and then it can be accurately judged whether each detection component can collect reliable image data.

[0024] In some implementations of the first aspect, the calibration piece of the contoured surface includes at least one graphic area in any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. If there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas.

[0025] The host computer is specifically used to obtain the second area image corresponding to each graphic area in the inspection image taken by each detection component, determine the area information of each second area image, compare the area information of each second area image with the reference area information of each graphic area, and generate the inspection result of the second shooting parameters of each detection component.

[0026] Based on this, by comparing the area information of the second region image with the reference area information of each graphic region, the image comparison result can be accurately obtained, and then it can be accurately judged whether each detection component can collect reliable image data.

[0027] In some implementations of the first aspect, the bare cell detection system further includes a lower computer;

[0028] The upper computer is also used to send image acquisition instructions to the lower computer;

[0029] The lower computer is used to generate a control instruction in response to the image acquisition instruction;

[0030] The conveying line is also used to convey bare cells or profiling blocks between the main body detection component, the first inner tab detection component, the outer tab detection component and the second inner tab detection component in response to control instructions.

[0031] Based on this, the upper computer, lower computer and conveyor line are linked to improve the automation level of the bare cell detection process. Moreover, the conveyor line only transports bare cells or contour blocks when it receives image acquisition instructions, reducing the loss of the bare cell detection system.

[0032] In a second aspect, an embodiment of the present application provides a spot inspection method for a bare cell detection system, comprising:

[0033] When the profiling block is conveyed to the inspection station corresponding to the main body inspection component through the conveyor line, the profiling large surface, the profiling top surface and the profiling bottom surface of the profiling block are photographed by the main body inspection component to obtain the profiling block large surface image, the profiling block top surface image and the profiling block bottom surface image;

[0034] When the profiling block is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the first inner tab inspection assembly photographs the inner surface of the profiling cathode tab of the profiling block to obtain a first image;

[0035] When the profiling block is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer tab inspection assembly photographs the outer surface of the profiling cathode tab and the outer surface of the profiling anode tab of the profiling block to obtain a second image of the outer surface of the profiling cathode tab and a third image of the outer surface of the profiling anode tab;

[0036] When the profiling block is conveyed to the inspection station of the second inner tab detection assembly via the conveyor line, the inner surface of the profiling anode tab of the profiling block is photographed by the second inner tab detection assembly to obtain a fourth image, wherein calibration pieces are provided on the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab inner surface, and the profiling anode tab outer surface, wherein the calibration pieces located on different profiling surfaces of the profiling block have similar shapes but different areas;

[0037] When the host computer receives any one of the inspection images among the large surface image of the profiling block, the top surface image of the profiling block, the bottom surface image of the profiling block, the first image, the second image, the third image and the fourth image, the host computer generates the inspection result of the inspection component corresponding to the inspection image based on the inspection image.

[0038] Based on this, by obtaining the inspection station of each inspection component when the fixed profiling block is reached at each inspection station, each inspection station can capture the image of the profiling surface corresponding to each inspection station. Afterwards, the upper computer can judge the inspection results of each inspection station based on the image of the profiling surface corresponding to each inspection station. The whole process requires little manual participation and effectively improves the inspection efficiency and accuracy.

[0039] In some implementations of the second aspect, when the inspection result of the main body detection component is a failure, the host computer outputs first adjustment information of the main body detection component, and returns the step of photographing the profiling block's large-surface, top-surface, and bottom-surface to obtain the profiling block's large-surface image, top-surface image, and bottom-surface image, wherein the first adjustment information includes at least one of the following: the position of the profiling block, the position of the main body detection component, and the photographing parameters of the main body detection component.

[0040] When the inspection result of the first inner tab detection assembly is unsatisfactory, the host computer outputs second adjustment information of the first inner tab detection assembly, and returns to the step of photographing the inner surface of the cathode tab of the profiling block by the first inner tab detection assembly to obtain a first image, wherein the second adjustment information includes at least one of the following: a position of the profiling block, a position of the first inner tab detection assembly, and a photographing parameter of the first inner tab detection assembly;

[0041] When the inspection result of the external tab detection assembly is unsatisfactory, the host computer outputs third adjustment information of the external tab detection assembly, and returns to the step of photographing the outer surface of the cathode tab and the outer surface of the anode tab by the profiling block through the external tab detection assembly to obtain a second image of the outer surface of the cathode tab and a third image of the outer surface of the anode tab, wherein the third adjustment information includes at least one of the following: the position of the profiling block, the position of the external tab detection assembly, and the photographing parameters of the external tab detection assembly;

[0042] Through the host computer, when the inspection result of the second inner pole tab detection component is unsatisfactory, the fourth adjustment information of the second inner pole tab detection component is output, and the step of photographing the inner surface of the contoured anode tab of the contouring block through the second inner pole tab detection component to obtain a fourth image is returned, wherein the fourth adjustment information includes at least one of the following: the position of the contouring block, the position of the second inner pole tab detection component, and the photographing parameters of the second inner pole tab detection component.

[0043] The detection component can be easily debugged and inspected until the detection component passes the inspection, which can effectively improve the detection accuracy of the bare cell detection system.

[0044] In some implementations of the second aspect, the calibration piece of the contoured surface includes at least one grayscale region within any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. If there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different.

[0045] Generate inspection results for each inspection component based on each inspection image, including:

[0046] Obtaining a first region image corresponding to each grayscale region in the spot inspection image taken by the host computer for each detection component, and determining grayscale information of each first region image;

[0047] The grayscale information of each first region image is compared with the reference grayscale information of each grayscale region to generate a spot inspection result of the first shooting parameter of each detection component.

[0048] In some implementations of the second aspect, the calibration piece of the contoured surface includes at least one graphic area in any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. If there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas.

[0049] Generate inspection results for each inspection component based on each inspection image, including:

[0050] Obtaining a second region image corresponding to each graphic region in the spot inspection image taken by the host computer for each detection component, and determining area information of each second region image;

[0051] The area information of each second region image is compared with the reference area information of each graphic region to generate a spot inspection result of the second shooting parameter of each detection component.

[0052] In some implementations of the second aspect, generating a spot inspection result for each detection component according to each spot inspection image includes:

[0053] If both the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter are passed, the spot inspection result of the inspection station is passed.

[0054] When at least one of the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter is detection failure, the detection result of the detection station is detection failure.

[0055] In a third aspect, the present application provides a method for detecting a bare cell, comprising:

[0056] When the bare cell is conveyed to the inspection station corresponding to the main body inspection assembly via the conveyor line, the main body inspection assembly photographs the large surface, the top surface, and the bottom surface of the bare cell main body to obtain a large surface image, a top surface image, and a bottom surface image, wherein the bare cell further includes a cathode tab and an anode tab extending out of the top surface of the main body;

[0057] When the bare battery cell is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the inner surface of the cathode tab of the bare battery cell is photographed by the first inner tab inspection assembly to obtain an image of the outer surface of the cathode tab;

[0058] When the bare battery cell is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer surface of the cathode tab and the outer surface of the anode tab of the bare battery cell are photographed by the outer tab inspection assembly to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface;

[0059] When the bare battery cell is conveyed to the inspection station of the second inner tab inspection assembly via the conveyor line, the inner surface of the anode tab is photographed by the second inner tab inspection assembly to obtain an image of the inner surface of the anode tab;

[0060] The upper computer detects the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image to obtain the surface detection results of the bare battery cell.

[0061] Based on this, when it is necessary to inspect the surface of the bare battery cell, the conveyor line can transport the bare battery cell to the main detection component, the first inner tab detection component, the outer tab detection component, and the second inner tab detection component respectively. Each detection component can automatically align with its corresponding bare battery cell surface, thereby realizing automated acquisition of the surface image of the bare battery cell. Finally, the host computer can generate the battery surface inspection results by identifying the surface images of each surface of the bare battery cell. Based on this, manpower can be effectively saved, and the host computer can determine the inspection results, which can also improve the inspection efficiency and accuracy of the inspection results.

[0062] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0064] FIG1 is a schematic structural diagram of a bare cell detection system provided in some embodiments of the present application;

[0065] FIG2 is a schematic flow chart of a bare cell detection method provided in some embodiments of the present application;

[0066] FIG3 is a schematic diagram of a bare cell inspection station provided in some embodiments of the present application;

[0067] FIG4 is a schematic structural diagram of a profiling block provided in some embodiments of the present application;

[0068] FIG5 is a schematic structural diagram of another profiling block provided in some embodiments of the present application;

[0069] FIG6 is a schematic structural diagram of another profiling block provided in some embodiments of the present application;

[0070] FIG7 is a schematic flow chart of a spot inspection method for a bare cell detection system provided in some embodiments of the present application;

[0071] FIG8 is a flow chart of another spot inspection method of a bare cell detection system provided by some embodiments of the present application;

[0072] FIG9 is a flow chart of another spot inspection method of a bare cell detection system provided in some embodiments of the present application;

[0073] FIG10 is a schematic diagram of the structure of a calibration component provided in some embodiments of the present application. DETAILED DESCRIPTION

[0074] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0075] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0076] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0077] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0078] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0079] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0080] The term "plurality" used in this application refers to two or more (including two).

[0081] In this application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" also includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0082] With the development of new energy technologies, batteries are increasingly being used in a wide range of applications, including mobile phones, laptops, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy planes, and power tools. As a crucial component of batteries, the quality of bare cells is becoming increasingly important.

[0083] At present, visual inspection is generally used to detect whether the surface of bare battery cells is qualified. However, since multiple surfaces of bare battery cells need to be inspected, in order to adapt to the conditions of different surfaces, different cameras need to be configured for each surface of the bare battery cells. This leads to a large number and variety of cameras required, and the cameras are scattered in position, which easily leads to low efficiency and low accuracy in the inspection results of whether the bare battery cell surfaces are qualified.

[0084] Exemplarily, a bare cell can be used as an electrode assembly, wherein a battery cell generally includes an electrode assembly. The bare cell includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through. The bare cell can be a winding structure. Exemplarily, the positive electrode sheet and the negative electrode sheet in the bare cell are wound into a winding structure. The bare cell can also be a laminated structure. Exemplarily, the positive electrode sheet and the negative electrode sheet in the bare cell can be provided in plurality, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked.

[0085] In related technologies, to improve the accuracy of surface inspection of bare battery cells, manual inspection is often used to inspect the surface of bare battery cells one by one or perform random inspections. However, with the increasingly stringent quality requirements for the surface of bare battery cells during production and the increase in production speed, manual inspection not only places great pressure on inspectors, but also may lead to problems such as inadequate inspection and low work efficiency, resulting in high labor costs.

[0086] Based on the above considerations, in order to improve the efficiency and accuracy of the surface detection results of bare cells, an embodiment of the present application provides a bare cell detection system, which includes a conveyor line, a bare cell main body detection component, a first inner pole ear detection component, an outer pole ear detection component, a second inner pole ear detection component and a host computer. When it is necessary to detect the surface of the bare cell, the conveyor line can transport the bare cell to the main body detection component, the first inner pole ear detection component, the outer pole ear detection component and the second inner pole ear detection component respectively. Each detection component can automatically align with its corresponding bare cell surface, thereby realizing automatic acquisition of the surface image of the bare cell, and finally, by identifying the surface images of each surface of the bare cell through the host computer, the detection results of the battery surface can be generated. Based on this, manpower can be effectively saved, and the detection results can be determined by the host computer, which can also improve the detection efficiency and the accuracy of the detection results.

[0087] The following first describes in detail the bare cell detection system provided by the embodiment of the present application in conjunction with Figure 1. As shown in Figure 1, the conveyor line 10 is used to convey the bare cell through the bare cell main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly, and the second inner tab detection assembly. The bare cell includes a main body, and a cathode tab and an anode tab extending from the top surface of the main body;

[0088] The main body detection component 21 is used to capture the main body, the top surface and the bottom surface of the main body when the bare cell arrives at the bare cell main body detection station, and obtain the main surface image, the top surface image and the bottom surface image;

[0089] The first inner tab detection component 22 is used to photograph the inner surface of the cathode tab of the bare cell when the bare cell arrives at the first inner tab detection station to obtain an image of the inner surface of the cathode tab;

[0090] The outer tab detection component 23 is used to photograph the outer surface of the cathode tab and the outer surface of the anode tab of the bare cell when the bare cell arrives at the tab detection station to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface;

[0091] The second inner tab detection component 24 is used to photograph the inner surface of the anode tab when the bare cell arrives at the second inner tab detection station to obtain an image of the inner surface of the anode tab;

[0092] The host computer 30 is used to detect the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image to obtain the surface detection result of the bare battery cell.

[0093] For example, in the bare cell detection system, the conveying path of the conveyor line can be pre-configured, and the main body detection station corresponding to the main body component, the first inner pole ear detection station corresponding to the first inner pole ear detection component, the outer pole ear detection station corresponding to the outer pole ear detection component, and the second inner pole ear detection station corresponding to the second inner pole ear detection component can be set on the conveying path.

[0094] When the bare cell arrives at the main body inspection station, the main body inspection component can photograph the main body's large surface, the main body's top surface and the main body's bottom surface to obtain a large surface image, a top surface image and a bottom surface image.

[0095] Optionally, the main body inspection component can include three cameras corresponding to the large surface, top surface, and bottom surface, respectively. After the bare cell arrives at the main body inspection station, the three cameras can be controlled by the lower computer to perform photography, thereby obtaining large surface images, top surface images, and bottom surface images of the bare cell. After the main body inspection component completes photography, it can send the captured large surface images, top surface images, and bottom surface images to the upper computer.

[0096] The bare battery cell also includes a cathode tab and an anode tab extending out of the top surface of the main body, wherein the anode tab and the cathode tab are arranged on the top surface of the bare battery cell along the length direction of the bare battery cell, wherein the inner surface of the cathode tab is opposite to the inner surface of the anode tab along the length direction of the bare battery cell, and the outer surface of the cathode tab is opposite to the outer surface of the anode tab along the length direction of the bare battery cell.

[0097] When the bare cell arrives at the first inner tab inspection station, the first inner tab inspection can photograph the inner surface of the cathode tab. Optionally, the first inner tab inspection assembly can include a camera for photographing the inner surface of the cathode tab.

[0098] After the first inner tab detection component completes the shooting, the image of the inner surface of the cathode tab can be sent to the host computer.

[0099] When the bare cell arrives at the outer tab inspection station, the outer tab inspection can capture images of the outer surface of the cathode tab and the outer surface of the anode tab. Optionally, the outer tab inspection assembly can include a camera for capturing the outer surface of the cathode tab and a camera for capturing the outer surface of the anode tab.

[0100] After the outer tab detection component completes the shooting, the captured cathode tab outer surface image and the anode tab outer surface image can be sent to the host computer.

[0101] When the bare cell arrives at the second inner tab inspection station, the second inner tab inspection can photograph the inner surface of the anode tab. Optionally, the second inner tab inspection assembly can include a camera for photographing the inner surface of the anode tab.

[0102] After the second inner tab detection assembly completes the photography, it can send the photographed images to the host computer. When the bare cell arrives at the first inner tab detection station, the first inner tab detection can photograph the inner surface of the cathode tab. Optionally, the first inner tab detection assembly can include a camera for photographing the inner surface of the cathode tab.

[0103] After the first inner tab detection component completes the shooting, the image of the inner surface of the cathode tab can be sent to the host computer.

[0104] In some embodiments, the host computer may be a device including a processor and a memory storing computer program instructions. The computer program instructions may be a neural network model for recognizing images, or instructions for performing logical operations on image data. The processor may include a central processing unit, or a specific integrated circuit, or may be configured to implement one or more integrated circuits of the embodiments of the present application. The memory may include a large-capacity memory for information or instructions. Optionally, the memory may be inside or outside the host computer. The processor reads and executes the computer program instructions stored in the memory, thereby respectively identifying the large surface image, the top surface image, the bottom surface image, the cathode tab inner surface image, the cathode tab outer surface image, the anode tab outer surface image, and the anode tab inner surface image, and obtaining the surface detection results of the bare battery cell.

[0105] According to an embodiment of the present application, when it is necessary to detect the surface of the bare battery cell, the conveyor line can transport the bare battery cell to the main body detection component, the first inner pole ear detection component, the outer pole ear detection component and the second inner pole ear detection component respectively. Each detection component can automatically align with the corresponding surface of the bare battery cell, thereby realizing the automatic acquisition of the surface image of the bare battery cell. Finally, the upper computer can generate the detection result of the battery surface by identifying the surface image of each surface of the bare battery cell. Based on this, manpower can be effectively saved, and the detection result can be determined by the upper computer, which can also improve the detection efficiency and the accuracy of the detection result.

[0106] FIG2 is a flow chart of a bare cell detection method provided in an embodiment of the present application. As shown in FIG2 , the bare cell detection method may include steps 201 to 205 .

[0107] Step 201: When the bare cell is conveyed to the inspection station corresponding to the main body inspection assembly via a conveyor line, the main body inspection assembly photographs the large surface, top surface, and bottom surface of the bare cell main body to obtain a large surface image, a top surface image, and a bottom surface image, wherein the bare cell further includes a cathode tab and an anode tab extending from the top surface of the main body;

[0108] Step 202: When the bare cell is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the inner surface of the cathode tab of the bare cell is photographed by the first inner tab inspection assembly to obtain an image of the outer surface of the cathode tab;

[0109] Step 203: When the bare cell is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer surface of the cathode tab and the outer surface of the anode tab of the bare cell are photographed by the outer tab inspection assembly to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface;

[0110] Step 204: When the bare battery cell is conveyed to the inspection station of the second inner tab inspection assembly via the conveyor line, the inner surface of the anode tab is photographed by the second inner tab inspection assembly to obtain an image of the inner surface of the anode tab;

[0111] Step 205 , the host computer detects the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image to obtain the surface detection result of the bare battery cell.

[0112] For example, Figure 3 is a schematic diagram of the setting of a bare cell detection station provided in an embodiment of the present application. As shown in Figure 3, the first station 1 is the detection station corresponding to the main body detection component, the second station 2 is the detection station of the first inner pole ear detection component, the third station 3 is the detection station of the pole ear detection component, and the fourth station 4 is the detection station of the second inner pole ear detection component. It can be understood that the position of each station can be set according to actual detection requirements and is not limited here.

[0113] Optionally, steps 201 to 204 are used to indicate that the conveyor line can convey the bare battery cells to the inspection stations corresponding to the main body inspection assembly, the first inner tab inspection assembly, the outer tab inspection assembly, and the second inner tab inspection assembly, respectively, rather than a specific limitation on the order of conveyance. The conveying order of the inspection stations corresponding to the main body inspection assembly, the first inner tab inspection assembly, the outer tab inspection assembly, and the second inner tab inspection assembly, respectively, can be determined based on the actual order of the inspection stations corresponding to the main body inspection assembly, the first inner tab inspection assembly, and the outer tab inspection assembly, respectively, and the second inner tab inspection assembly in the bare battery cells.

[0114] According to an embodiment of the present application, the conveyor line can convey the bare battery cells to the main body detection component, the first inner tab detection component, the outer tab detection component, and the second inner tab detection component respectively. Each detection component can automatically align with the surface of the corresponding bare battery cell, thereby realizing the automatic acquisition of the surface image of the bare battery cell. Finally, the upper computer can identify the surface images of each surface of the bare battery cell, thereby generating the detection results of the battery surface. Based on this, manpower can be effectively saved, and the detection results can be determined by the upper computer, which can also improve the detection efficiency and the accuracy of the detection results.

[0115] In some embodiments, in order to improve the accuracy of the bare cell surface detection results output by the bare cell detection system, each detection component in the bare cell detection system can be inspected before the bare cell detection system performs the detection, or according to a preset detection cycle.

[0116] Specifically, Figure 4 is a structural schematic diagram of a profiling block provided in an embodiment of the present application, Figure 5 is a structural schematic diagram of another profiling block provided in an embodiment of the present application, and Figure 6 is a structural schematic diagram of yet another profiling block provided in an embodiment of the present application. Combined with Figures 4, 5 and 6, the profiling block matches the structure of the bare battery cell, and the profiling block includes a profiling large surface corresponding to the large surface of the bare battery cell, a profiling top surface corresponding to the top surface of the bare battery cell, a profiling bottom surface corresponding to the bottom surface of the bare battery cell, a profiling cathode ear inner surface corresponding to the inner surface of the cathode ear, a profiling cathode ear outer surface corresponding to the outer surface of the cathode ear, a profiling anode ear inner surface corresponding to the inner surface of the anode ear, and a profiling anode ear outer surface corresponding to the inner surface of the anode ear.

[0117] Continuing with Figures 4, 5 and 6, the contoured large surface 41, the contoured top surface 42, the contoured bottom surface 43, the contoured cathode tab inner surface 44, the contoured cathode tab outer surface 45, the contoured anode tab inner surface 46 and the contoured anode tab outer surface 47 are all provided with calibration parts, wherein the calibration parts located on different contoured surfaces of the contouring block have similar shapes but different areas.

[0118] In the bare cell detection system, the conveyor line is further used to convey the profiling block through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly, the profiling block including the profiling body, and the cathode profiling tab and the anode profiling tab extending from the top surface of the profiling body;

[0119] Any one of the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly, and the second inner tab detection assembly is further configured to capture an image of the corresponding profiling surface of the detection assembly to obtain a spot inspection image when the profiling block reaches the corresponding detection station of the detection assembly;

[0120] The host computer is also used to generate the inspection results of each inspection component based on each inspection image.

[0121] For example, the shaped block can be a product that mimics an actual bare cell, with the shape and size of the shaped block being consistent with the shape and size of the actual bare cell. For example, the main body of an actual bare cell is rectangular, and the main body of the shaped block is also rectangular; the top surface of the main body of an actual bare cell extends an anode tab and a cathode tab, and the top surface of the main body of the shaped block extends a shaped anode tab and a shaped cathode tab.

[0122] For example, the outer dimensions of the profiling block can be designed according to the dimensions of the blue cell drawing, and the thickness of the profiling block can be designed according to the length of the anode diaphragm to prevent the prism inside the tab from hitting the inspection block. The step can be designed according to the size of the narrowest tab, and the size can be designed according to the width of the blue cell tab. The step can be designed according to the width of the narrowest tab to facilitate the verification of the camera's dissolving image, and the mounting space can be designed according to the size of the verification part on each profiling surface of the profiling block. For example, after each verification part is affixed to the mounting space of the profiling surface, 2-3mm of space redundancy can be reserved in the mounting space for the verification part to facilitate replacement and re-attachment of the verification part.

[0123] In the bare cell detection system, the output line can transport the bare cell to the detection stations corresponding to the main body detection component, the first inner tab detection component, the outer tab detection component and the second inner tab detection component, so that each detection station can take pictures of the profiling block.

[0124] Specifically, the main body detection component, the first inner tab detection component, the outer tab detection component and the second inner tab detection component can respectively capture images of the contoured surfaces of the contouring block.

[0125] After obtaining the image of each profiling surface of the profiling block, the host computer can identify whether the image includes the calibration part and detect the position of the calibration part, thereby determining whether the position of each detection component needs to be corrected. The host computer can also identify image data such as the grayscale value of the calibration part in the image, thereby determining whether the parameters of the camera in each detection component need to be adjusted.

[0126] According to the embodiment of the present application, the calibration parts used for spot inspection of each detection workstation are integrated on the surface of the profiling block that is consistent with the shape and size of the real bare battery cell. On the one hand, it is convenient to keep the various calibration parts. On the other hand, it can automatically simulate the inspection process of the bare battery cell, save labor costs, and make the inspection results more referenceable. Moreover, since the inspection of each detection component can be performed during the operation of the bare battery cell system, the equipment loss caused by the shutdown of the bare battery cell inspection system can be effectively reduced.

[0127] In some embodiments, the calibration piece includes at least one grayscale region in any of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. If there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different.

[0128] The host computer is specifically used to obtain the first area image corresponding to each grayscale area in the spot inspection image taken for each detection component, determine the grayscale information of each first area image, compare the grayscale information of each first area image with the reference grayscale information of each grayscale area, and generate the spot inspection result of the first shooting parameter of each detection component.

[0129] For example, FIG10 is a schematic diagram of a calibration piece structure provided in an embodiment of the present application. As shown in FIG10 , the calibration piece may include multiple grayscale regions with different grayscale levels. For example, grayscale region 501, grayscale region 502, grayscale region 503, and grayscale region 504. It can be seen that grayscale region 501, grayscale region 502, grayscale region 503, and grayscale region 504 have different grayscale values.

[0130] Optionally, the grayscales (0-255) of the multiple grayscale regions can be distributed in a percentage gradient from light to dark, and the tolerance between two adjacent grayscales can differ by 20 grayscale values. The host computer obtains the first region image corresponding to each grayscale region, determines the grayscale information of each first region image, and then compares the grayscale information of each first region image with the reference grayscale information of each grayscale region to generate a spot inspection result of the first shooting parameter of each detection component. The first shooting parameter may include the white balance parameter of the camera.

[0131] According to an embodiment of the present application, by comparing the grayscale information of the grayscale area in the image with the reference grayscale information of the grayscale area, the image comparison result can be accurately obtained, and then it can be accurately judged whether each detection component is capable of collecting reliable image data.

[0132] In some embodiments, the calibration piece of the contoured surface includes at least one graphic area in any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. When there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas.

[0133] The host computer is specifically used to obtain the second area image corresponding to each graphic area in the inspection image taken by each detection component, determine the area information of each second area image, compare the area information of each second area image with the reference area information of each graphic area, and generate the inspection result of the second shooting parameters of each detection component.

[0134] Optionally, in the calibration piece, the positional relationship between the graphic region and the grayscale region may completely overlap, partially overlap, or not overlap, without limitation. The calibration piece may further include multiple graphic regions. Optionally, the graphic regions include, but are not limited to, regular shapes such as circles, triangles, rectangles, and pentagons, and may also include irregular shapes.

[0135] Optionally, a one-to-one correspondence can be provided between the grayscale region and the graphic region in each calibration component. For ease of understanding, the following description uses a circle as an example. Further referring to FIG10 , the graphic region is located within the grayscale region, i.e., the grayscale region coincides with the graphic region, and the geometric centers of the grayscale region and the graphic region coincide. Further referring to FIG10 , graphic region 505, graphic region 506, graphic region 507, and graphic region 508 are shown. It can be seen that the areas of graphic region 505, graphic region 506, graphic region 507, and graphic region 508 are different.

[0136] Optionally, the calibration piece may include an outer frame and a main body, the outer frame is arranged around the main body, and the grayscale area and the graphic area are both arranged in the main body. Based on this, by integrating the two calibration features into the calibration piece, it is beneficial to improve the verification accuracy.

[0137] In some embodiments, the calibration piece may include multiple graphic regions of different sizes. For example, as shown in FIG10 , the difference in diameter between two adjacent graphic regions may be 0.2 mm.

[0138] For each inspection component, the host computer identifies the graphic area in the calibration piece and compares the area information of the graphic area with the reference area information of the graphic area to generate a spot inspection result for the second shooting parameter of each inspection component. Exemplary second shooting parameters include camera lens distortion parameters, pixel-to-millimeter conversion ratio, etc.

[0139] According to an embodiment of the present application, by comparing the area information of the second region image with the reference area information of each graphic region, an accurate image comparison result can be obtained, thereby accurately judging whether each detection component is capable of collecting reliable image data.

[0140] In some embodiments of the present application, the bare cell detection system also includes a lower computer; specifically, the upper computer is also used to send image acquisition instructions to the lower computer; the lower computer is used to generate control instructions in response to the image acquisition instructions; the conveyor line is also used to convey bare cells or profiling blocks between the main body detection component, the first inner pole ear detection component, the outer pole ear detection component and the second inner pole ear detection component in response to the control instructions.

[0141] Specifically, the host computer sends an image acquisition instruction to the slave computer. Upon receiving the image acquisition instruction, the slave computer generates a control instruction. Based on this control instruction, the conveyor line can then transport the bare cells or profiling blocks to the inspection station corresponding to the target inspection component. This achieves linkage between the host computer, the slave computer, and the conveyor line, improving the automation level of the bare cell inspection system's inspection process. Furthermore, the conveyor line only transports bare cells or profiling blocks when it receives the image acquisition instruction, reducing losses in the bare cell inspection system.

[0142] Based on the same inventive concept as the bare cell detection system provided in the embodiments of the present application, the embodiments of the present application also provide a spot inspection method for a bare cell detection system. FIG7 is a flow chart of a spot inspection method for a bare cell detection system provided in the embodiments of the present application. As shown in FIG7 , the spot inspection method for a bare cell detection system may include steps 301 to 305.

[0143] Step 301: When the profiling block is conveyed to the inspection station corresponding to the main body inspection component via the conveyor line, the main body inspection component photographs the profiling block's large surface, top surface, and bottom surface to obtain a large surface image, a top surface image, and a bottom surface image of the profiling block.

[0144] Step 302 , when the profiling block is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the first inner tab inspection assembly photographs the inner surface of the profiling cathode tab of the profiling block to obtain a first image;

[0145] Step 303: When the profiling block is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer tab inspection assembly photographs the outer surface of the cathode tab and the outer surface of the anode tab of the profiling block to obtain a second image of the outer surface of the cathode tab and a third image of the outer surface of the anode tab;

[0146] Step 304: When the profiling block is conveyed to the inspection station of the second inner tab inspection assembly via the conveyor line, the second inner tab inspection assembly photographs the inner surface of the profiling anode tab of the profiling block to obtain a fourth image, wherein calibration pieces are provided on the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab inner surface, and the profiling anode tab outer surface, wherein the calibration pieces located on different profiling surfaces of the profiling block have similar shapes but different areas;

[0147] Step 305: When the host computer receives any one of the large-surface image of the profiling block, the top surface image of the profiling block, the bottom surface image of the profiling block, the first image, the second image, the third image, and the fourth image, the host computer generates an inspection result of the inspection component corresponding to the inspection image based on the inspection image.

[0148] Based on this, by obtaining the inspection station of each inspection component when the fixed profiling block is reached at each inspection station, each inspection station can capture the image of the profiling surface corresponding to each inspection station. Afterwards, the upper computer can judge the inspection results of each inspection station based on the image of the profiling surface corresponding to each inspection station. The whole process requires little manual participation and effectively improves the inspection efficiency and accuracy.

[0149] In some embodiments, when the inspection result of the main body detection component is a failure, the host computer outputs first adjustment information of the main body detection component, and returns the step of photographing the profiling large surface, the profiling top surface, and the profiling bottom surface of the profiling block by the main body detection component to obtain the profiling block large surface image, the profiling block top surface image, and the profiling block bottom surface image, wherein the first adjustment information includes at least one of the following: the position of the profiling block, the position of the main body detection component, and the photographing parameters of the main body detection component;

[0150] When the inspection result of the first inner tab detection assembly is unsatisfactory, the host computer outputs second adjustment information of the first inner tab detection assembly, and returns to the step of photographing the inner surface of the cathode tab of the profiling block by the first inner tab detection assembly to obtain a first image, wherein the second adjustment information includes at least one of the following: a position of the profiling block, a position of the first inner tab detection assembly, and a photographing parameter of the first inner tab detection assembly;

[0151] When the inspection result of the external tab detection assembly is unsatisfactory, the host computer outputs third adjustment information of the external tab detection assembly, and returns to the step of photographing the outer surface of the cathode tab and the outer surface of the anode tab by the profiling block through the external tab detection assembly to obtain a second image of the outer surface of the cathode tab and a third image of the outer surface of the anode tab, wherein the third adjustment information includes at least one of the following: the position of the profiling block, the position of the external tab detection assembly, and the photographing parameters of the external tab detection assembly;

[0152] Through the host computer, when the inspection result of the second inner pole tab detection component is unsatisfactory, the fourth adjustment information of the second inner pole tab detection component is output, and the step of photographing the inner surface of the contoured anode tab of the contouring block through the second inner pole tab detection component to obtain a fourth image is returned, wherein the fourth adjustment information includes at least one of the following: the position of the contouring block, the position of the second inner pole tab detection component, and the photographing parameters of the second inner pole tab detection component.

[0153] Based on this, when the inspection result of each detection component is failed, it means that the inspection component needs to be debugged. Optionally, the debugging objects include but are not limited to the position of the profiling block, the position of the detection component, the shooting parameters of the detection component, etc.

[0154] According to the embodiment of the present application, the detection component can be easily debugged and inspected until the detection component passes the inspection, thereby effectively improving the detection accuracy of the bare cell detection system.

[0155] In some embodiments, the calibration piece of the contoured surface includes at least one grayscale region in any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. When there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different.

[0156] Generate inspection results for each inspection component based on each inspection image, including:

[0157] Obtaining a first region image corresponding to each grayscale region in the spot inspection image taken by the host computer for each detection component, and determining grayscale information of each first region image;

[0158] The grayscale information of each first region image is compared with the reference grayscale information of each grayscale region to generate a spot inspection result of the first shooting parameter of each detection component.

[0159] According to an embodiment of the present application, by comparing the grayscale information of the grayscale area in the image with the reference grayscale information of the grayscale area, the image comparison result can be accurately obtained, and then it can be accurately judged whether each detection component is capable of collecting reliable image data.

[0160] In some embodiments, the calibration piece of the contoured surface includes at least one graphic area in any contoured surface of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface. When there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas.

[0161] Generate inspection results for each inspection component based on each inspection image, including:

[0162] Obtaining a second region image corresponding to each graphic region in the spot inspection image taken by the host computer for each detection component, and determining area information of each second region image;

[0163] The area information of each second region image is compared with the reference area information of each graphic region to generate a spot inspection result of the second shooting parameter of each detection component.

[0164] Based on this, by comparing the area information of the second region image with the reference area information of each graphic region, the image comparison result can be accurately obtained, and then it can be accurately judged whether each detection component can collect reliable image data.

[0165] In some embodiments, based on each inspection image, an inspection result of each inspection component is generated, including: when the inspection result of the first shooting parameter and the inspection result of the second shooting parameter are both inspection passed, the inspection result of the inspection station is inspection passed; when at least one of the inspection result of the first shooting parameter and the inspection result of the second shooting parameter is inspection failed, the inspection result of the inspection station is inspection failed.

[0166] Specifically, after the upper computer obtains each inspection image, it can input each inspection image into the recognition model, and generate a first shooting parameter inspection result and a second shooting parameter inspection result for each inspection image, wherein the first shooting parameter inspection result can be passed or failed, and the second shooting parameter inspection result can be passed or failed.

[0167] Based on the embodiments of the present application, the detection components are verified by combining the two verification features of the contoured surface, so that it is possible to accurately determine whether each detection component is capable of collecting reliable image data.

[0168] In order to more clearly illustrate the spot inspection process of each detection component in the bare cell detection system according to the embodiment of the present application, the spot inspection method is introduced below in conjunction with a specific embodiment.

[0169] Figure 8 is a flow chart of another spot inspection method for a bare cell detection system provided in an embodiment of the present application, and Figure 9 is a flow chart of yet another spot inspection method for a bare cell detection system provided in an embodiment of the present application. Combined with Figures 8 and 9 , the spot inspection method may include steps 701 to 721.

[0170] Step 701, the lower computer controls the conveyor line to convey the profiling block to the main body detection component;

[0171] Step 702: The lower computer controls the main body detection component to capture the large-surface, top-surface, and bottom-surface images of the profiling block to obtain a large-surface image, a top-surface image, and a bottom-surface image of the profiling block.

[0172] Step 703, determining each grayscale region within each profiling surface image in the profiling block large surface image, the profiling block top surface image, and the profiling block bottom surface image, as well as each graphic region within each profiling surface, by the host computer;

[0173] Step 704: The host computer generates a spot inspection result of the main body detection component based on the grayscale area in each profiling surface image and the reference grayscale information of each grayscale area, and based on each graphic area in each profiling surface and the reference area information of each graphic area.

[0174] If the inspection result of the main body detection component is not passed, go to step 705;

[0175] If the inspection result of the main body detection component is passed, proceed to step 706;

[0176] Step 705: Output the first adjustment information via the host computer, and return to step 702;

[0177] The first adjustment information may include at least one of the following: a position of the profiling block, a position of the subject detection component, and a shooting parameter of the subject detection component.

[0178] Step 706, controlling the conveyor line through the lower computer to convey the profiling block to the first inner tab detection assembly;

[0179] Step 707 , controlling the first inner tab detection component via the lower computer to photograph the inner surface of the contoured cathode tab to obtain a first image;

[0180] Step 708: determining the grayscale area in the first image and each graphic area in the first image by the host computer;

[0181] Step 709: Generate, by the host computer, a spot inspection result of the first inner tab detection component based on the grayscale areas in the first image and the reference grayscale information of each grayscale area, and based on each graphic area in the first image and the reference area information of each graphic area;

[0182] If the inspection result of the first inner tab detection assembly is not passed, proceed to step 710;

[0183] If the inspection result of the first inner tab detection assembly is passed, proceed to step 711;

[0184] Step 710: Output the second adjustment information via the host computer, and return to step 707;

[0185] The second adjustment information may include at least one of the following: a position of the profiling block, a position of the first inner pole detection assembly, and a shooting parameter of the first inner pole detection assembly.

[0186] 8 , in step 711 , the lower computer controls the conveyor line to convey the profiling block to the outer tab detection assembly;

[0187] Step 712: Control the outer ear detection component via the lower computer to photograph the outer surface of the contoured cathode tab to obtain a second image, and photograph the outer surface of the contoured anode tab to obtain a third image.

[0188] Step 713: determining, by the host computer, a grayscale region within each of the second image and the third image, and determining each graphic region within each of the second image and the third image;

[0189] Step 714: Generate, by the host computer, a spot inspection result of the outer tab detection assembly based on the grayscale area in each of the second image and the third image and the reference grayscale information of each grayscale area, and based on each graphic area in each of the second image and the third image and the reference area information of each graphic area;

[0190] If the inspection result of the outer tab detection component is not passed, go to step 715;

[0191] If the inspection result of the outer tab detection assembly is passed, proceed to step 716;

[0192] Step 715: Output the third adjustment information via the host computer, and return to step 712;

[0193] The third adjustment information may include at least one of the following: a position of the profiling block, a position of the outer pole detection component, and a shooting parameter of the outer pole detection component.

[0194] Step 716, controlling the conveyor line through the lower computer to convey the profiling block to the second inner tab detection assembly;

[0195] Step 717, controlling the second inner ear detection component via the lower computer to photograph the inner surface of the contoured anode tab to obtain a fourth image;

[0196] Step 718, determining the grayscale area in the fourth image and each graphic area in the fourth image by the host computer;

[0197] Step 719: Generate, by the host computer, a spot inspection result of the second inner tab detection assembly based on the grayscale areas in the fourth image and the reference grayscale information of each grayscale area, and based on each graphic area in the fourth image and the reference area information of each graphic area;

[0198] If the inspection result of the second inner tab detection assembly is not passed, proceed to step 720;

[0199] If the inspection result of the second inner tab detection assembly is passed, proceed to step 721;

[0200] Step 720: Output the fourth adjustment information via the host computer, and return to step 717;

[0201] The fourth adjustment information may include at least one of the following: a position of the profiling block, a position of the second inner pole detection assembly, and a shooting parameter of the second inner pole detection assembly.

[0202] Step 721: The lower computer controls the conveyor line to transport the profiling block out of the bare cell inspection system.

[0203] According to the embodiment of the present application, by obtaining the detection station of each detection component when the fixed profiling block is reached at each detection station, each detection station can capture an image of the profiling surface corresponding to each detection station. Afterwards, the upper computer can judge the inspection results of each detection station based on the image of the profiling surface corresponding to each detection station. The whole process requires little manual participation and effectively improves the inspection efficiency and accuracy.

[0204] It can be understood that in the embodiments of the present application, when the "detection component" appears alone, it can refer to any one of the main body detection component, the first inner tab detection component, the outer tab detection component and the second inner tab detection component.

[0205] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0206] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A bare cell detection system, comprising: A conveyor line is used to convey a bare cell through a bare cell main body detection assembly, a first inner tab detection assembly, an outer tab detection assembly, and a second inner tab detection assembly, wherein the bare cell includes a main body and a cathode tab and an anode tab extending from a top surface of the main body; The main body detection component is used to photograph the large surface, the top surface and the bottom surface of the main body when the bare cell arrives at the bare cell main body detection station to obtain a large surface image, a top surface image and a bottom surface image; The first inner tab detection component is used to photograph the inner surface of the cathode tab of the bare cell when the bare cell arrives at the first inner tab detection station to obtain an image of the inner surface of the cathode tab; The outer tab detection component is used to photograph the outer surface of the cathode tab and the outer surface of the anode tab of the bare cell when the bare cell arrives at the tab detection station to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface; The second inner tab detection component is used to photograph the inner surface of the anode tab when the bare battery cell arrives at the second inner tab detection station to obtain an image of the inner surface of the anode tab; The host computer is used to detect the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image to obtain the surface detection result of the bare battery cell.

2. The system according to claim 1, wherein: The conveying line is further used to convey the profiling block through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly, the profiling block including a profiling body and a cathode profiling tab and an anode profiling tab extending from the top surface of the profiling body; The profiling block matches the structure of the bare cell, and the profiling block includes a profiling large surface corresponding to the large surface of the bare cell, a profiling top surface corresponding to the top surface of the bare cell, a profiling bottom surface corresponding to the bottom surface of the bare cell, a profiling cathode tab inner surface corresponding to the inner surface of the cathode tab, a profiling cathode tab outer surface corresponding to the outer surface of the cathode tab, a profiling anode tab inner surface corresponding to the inner surface of the anode tab, and a profiling anode tab outer surface corresponding to the inner surface of the anode tab; The contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab inner surface, and the contoured anode tab outer surface are all provided with calibration pieces, wherein the calibration pieces located on different contoured surfaces of the contoured block have similar shapes but different areas; Any one of the main body detection component, the first inner tab detection component, the outer tab detection component, and the second inner tab detection component is further configured to capture an image of the corresponding profiling surface of the detection component to obtain a spot inspection image when the profiling block reaches the detection station corresponding to the detection component; The host computer is further configured to generate a spot inspection result for each of the detection components based on each of the spot inspection images.

3. The system according to claim 2, wherein: In any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, the calibration piece in the contoured surface includes at least one grayscale region, and when there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different; The host computer is specifically further used to obtain the first area image corresponding to each grayscale area in the spot inspection image taken by each detection component, determine the grayscale information of each first area image, compare the grayscale information of each first area image with the reference grayscale information of each grayscale area, and generate a spot inspection result of the first shooting parameters of each detection component.

4. The system according to claim 2, wherein: In any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, the calibration piece in the contoured surface includes at least one graphic area, and when there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas; The host computer is further configured to obtain a second area image corresponding to each graphic area in the spot inspection image taken by each detection component, and determine each The area information of the second region image is compared with the reference area information of each of the graphic regions to generate a spot inspection result of the second shooting parameter of each of the detection components.

5. The system according to claim 2, wherein: The bare cell detection system also includes a lower computer; The host computer is further configured to send an image acquisition instruction to the slave computer; The lower computer is configured to generate a control instruction in response to the image acquisition instruction; The conveying line is further used to convey the bare battery cell or the profiling block between the main body detection component, the first inner tab detection component, the outer tab detection component and the second inner tab detection component in response to the control instruction.

6. A spot inspection method for a bare cell detection system, comprising: When the profiling block is conveyed to the inspection station corresponding to the main body inspection component via the conveyor line, the main body inspection component photographs the profiling large surface, the profiling top surface and the profiling bottom surface of the profiling block to obtain the profiling block large surface image, the profiling block top surface image and the profiling block bottom surface image; When the profiling block is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the first inner tab inspection assembly photographs the inner surface of the profiling cathode tab of the profiling block to obtain a first image; When the profiling block is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer tab inspection assembly photographs the outer surface of the profiling cathode tab and the outer surface of the profiling anode tab of the profiling block to obtain a second image of the outer surface of the profiling cathode tab and a third image of the outer surface of the profiling anode tab; When the profiling block is conveyed to the inspection station of the second inner tab inspection assembly via the conveyor line, the inner surface of the profiling anode tab of the profiling block is photographed by the second inner tab inspection assembly to obtain a fourth image, wherein calibration pieces are provided on the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab inner surface, and the profiling anode tab outer surface, wherein the calibration pieces located on different profiling surfaces of the profiling block have similar shapes but different areas; The host computer receives the large-surface image of the profiling block, the top surface image of the profiling block, the bottom surface image of the profiling block, the first image, the second image, the third image and the fourth image. In the case of any inspection image in the image, the host computer generates an inspection result of the inspection component corresponding to the inspection image based on the inspection image.

7. The method according to claim 6, wherein: The method further comprises: When the inspection result of the main body detection component is unsatisfactory, the host computer outputs first adjustment information of the main body detection component and returns to the step of photographing the profiling large surface, the profiling top surface and the profiling bottom surface of the profiling block by the main body detection component to obtain the profiling block large surface image, the profiling block top surface image and the profiling block bottom surface image, wherein the first adjustment information includes at least one of the following: the position of the profiling block, the position of the main body detection component and the photographing parameters of the main body detection component; When the inspection result of the first inner tab detection assembly is unsatisfactory, the host computer outputs second adjustment information of the first inner tab detection assembly, and returns to the step of photographing the inner surface of the cathode tab of the profiling block by the first inner tab detection assembly to obtain a first image, wherein the second adjustment information includes at least one of the following: the position of the profiling block, the position of the first inner tab detection assembly, and the photographing parameters of the first inner tab detection assembly; By means of the host computer, when the inspection result of the outer tab detection assembly is unpassed, third adjustment information of the outer tab detection assembly is outputted, and the step of photographing the outer surface of the cathode tab and the outer surface of the anode tab of the profiling block by the outer tab detection assembly is returned to obtain a second image of the outer surface of the cathode tab and a third image of the outer surface of the anode tab, wherein the third adjustment information includes at least one of the following: the position of the profiling block, the position of the outer tab detection assembly, and the photographing parameters of the outer tab detection assembly; Through the host computer, when the inspection result of the second inner pole tab detection component is failure, fourth adjustment information of the second inner pole tab detection component is output, and the step of photographing the inner surface of the contoured anode tab of the contouring block through the second inner pole tab detection component to obtain a fourth image is returned, wherein the fourth adjustment information includes at least one of the following: the position of the contouring block, the position of the second inner pole tab detection component, and the shooting parameters of the second inner pole tab detection component.

8. The method according to claim 6, wherein: On the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab In any one of the contoured surfaces of the inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, the calibration piece of the contoured surface includes at least one grayscale region, and when there are multiple grayscale regions, the grayscale levels of the multiple grayscale regions are different; Generating a spot inspection result for each detection component according to each spot inspection image includes: Obtaining, by the host computer, the first region image corresponding to each grayscale region in the spot inspection image taken by each detection component, and determining the grayscale information of each first region image; The grayscale information of each of the first region images is compared with the reference grayscale information of each of the grayscale regions to generate a spot inspection result of the first shooting parameters of each of the detection components.

9. The method according to claim 8, wherein In any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, the calibration piece of the contoured surface includes at least one graphic area, and when there are multiple graphic areas, the multiple graphic areas have similar shapes but different areas; Generating a spot inspection result for each detection component according to each spot inspection image includes: Obtaining, by the host computer, the spot inspection image taken by each detection component, a second region image corresponding to each graphic region in the spot inspection image, and determining area information of each second region image; The area information of each second region image is compared with the reference area information of each graphic region to generate a spot inspection result of the second shooting parameter of each detection component.

10. The method according to claim 9, wherein: Generating a spot inspection result for each detection component according to each spot inspection image includes: If both the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter are inspection passed, the spot inspection result of the inspection station is inspection passed; When at least one of the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter is detection failure, the detection result of the detection station is detection failure.

11. A method for detecting a bare battery cell, comprising: When the bare cell is conveyed to the inspection station corresponding to the main body inspection assembly via the conveyor line, the main body inspection assembly photographs the large surface, the top surface, and the bottom surface of the main body of the bare cell to obtain a large surface image, a top surface image, and a bottom surface image, wherein the bare cell further includes a cathode tab and an anode tab extending from the top surface of the main body; When the bare battery cell is conveyed to the inspection station of the first inner tab inspection assembly via the conveyor line, the inner surface of the cathode tab of the bare battery cell is photographed by the first inner tab inspection assembly to obtain an image of the outer surface of the cathode tab; When the bare cell is conveyed to the inspection station of the outer tab inspection assembly via the conveyor line, the outer surface of the cathode tab and the outer surface of the anode tab of the bare cell are photographed by the outer tab inspection assembly to obtain an image of the cathode tab outer surface and an image of the anode tab outer surface; When the bare battery cell is conveyed to the inspection station of the second inner tab inspection assembly via the conveyor line, the inner surface of the anode tab is photographed by the second inner tab inspection assembly to obtain an image of the inner surface of the anode tab; The surface detection result of the bare battery cell is obtained by detecting the large surface image, top surface image, bottom surface image, cathode tab inner surface image, cathode tab outer surface image, anode tab outer surface image and anode tab inner surface image through the host computer.

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